#include <iostream>
using namespace std;

int comput(int a, int b, char opt)
{
    int res;
    switch (opt)
    {
    case '+':
        res = a + b;
        break;
    case '-':
        res = a - b;
        break;
    case '*':
        res = a * b;
        break;
    case '/':
        res = a / b;
        break;
    default:
        break;
    }
    return res;
}


int main(int argc, char const *argv[])
{
    /* code */
    return 0;
}
